The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1976
Filed:
Sep. 08, 1975
Le Roy Kochel, Fridley, MN (US);
Stanley J Lins, Minneapolis, MN (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
A generator of single wall domains, i.e., bubbles, for a bubble memory system is disclosed. The generator includes a closed feed ring, constructed of a repetitive pattern of magnetically soft chevrons, having merging input and output channels of similar chevron design. A nucleator in the input channel, driven at one-half the frequency of the rotating in-plane field, generates a bubble every other cycle of the in-plane field frequency such that only alternate positions along the input channel, and correspondingly the feed ring, are initially filled with bubbles. The bubbles, as driven around the four 90.degree. corners of the feed ring, are delayed one complete cycle of the in-plane field frequency such that the generated bubbles from the input channel and the bubbles in the feed ring fill alternate positions along the feed ring. Thus, after the first generated bubble completes two complete cycles of the feed ring, the feed ring is filled. Once the feed ring is filled, the nucleator is no longer used, as the feed ring, via the output channel, continually feeds bubbles to the associated major loop.